Perhaps you should try some spelling variations:
truong quang » truong quan, luong quang, thong quang
minh truong » minh tuong, sinh truong, minh thuong
khang kiem » khanh kiem, thong kiem, bang kiem
hieu suat » hieu luat, hieu qua
phan kiem » phan kien, phan mem, van kiem
van hieu » cao hieu
tin » tinh
luan » quan, lan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan van hieu suat ) OR ( minh truong quang ((khang kiem) OR (phan kiem)) soat ))~.
• Adding a wildcard symbol may retrieve word variants: (( tin dung luan van hieu suat ) or ( minh truong quang ((khang kiem) or (phan kiem)) soat ))*.